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Passive extension

Passive extension ensures that the knee retains full extension (straightening).

While lying in bed in the early stages of injury or post-surgery, avoid putting a pillow under your knee. It may be more comfortable, but can lead to a flexion deformity (knee fixed in bent position).

But it is a good extension exercise to periodically put a pillow under your ankles. The weight of the leg will force the knee straighter (into extension - passive extension).

 

PVC tubes

If you can persuade someone to go to a plumbing store and buy you a couple of short lengths of PVC pipe this will be more useful for doing passive extensions once you are up and about as you can increase the height and be sure of exactly how much stress is being put on the knee. Pillows can be rather variable.

 

passive extension knee exercisepassive extension knee exercise

Updated: 22 Apr, 2013
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